chkconfig.ltx: remove check for cbgreek

- we would need to check for a font but this doesn't work in branch. To Thus the current check is senseless because it will always fail, see #8522. Therefore I revert its addition to keep branch clean.

Note the check for wasy in branch shows the same problematic but it is there for ages.

lib/chkconfig.ltx

@@ -349,7 +349,6 @@
 % Other font packages
 \TestPackage{ae}
 \TestPackage{bera}
-\TestPackage[glic1000.tfm]{cbgreek}% for Greek
 \TestPackage{ccfonts}
 \TestPackage{cmbright}
 \TestPackage{eco}